Bulldozer grading attachment for crawler tractors



June 18, 1946. w. s. TAYLOR BULLDOZER GRADING ATTACHMENT FOR CRAWLERTRACTORS Filed April '7, 1944 I NI "EN TOR.

Zizylar A? TOR/V5 Y Patented June 18, 1946 UNITED STATE-s iff ra'rsurOFFICE BuLLnozEaonApmG ATTACHMENT FOB CRAWLER 'raao'roas WilliamSneed'Taylor, Seattle, Application Aprill, 1944, Serial Nth-530.013

This invention relates to grading and hoisting attachments for crawlertractors.

An object of this invention is to provide grading and hoistingattachments for crawler tractors that are highly eflicient in clearingground and moving earthy material, such for instance as clearing andgrading a right of way.

Another object is to provide grading and hoisting attachments of strongand simple construction that are durable and eillcient in operation,that do not require precision work in their manufacture and that are notexpensive to produce.

Another object is to provide crawler tractor attachments that makepossible land clearing and grading at a substantial saving in time andlabor, which means a substantial saving in the cost of such clearing andgrading.

Another object is to provide bulldozer attachments for a crawler tractorthat may very quickly and easily be applied to and removed from thetractor, thus making it convenient to relieve the tractor of thebulldozer attachments when the tractor is to be used for work other thanbulldozing or grading and to pick up these attachments when bulldozingor grading work is to be done.

Another object is to provide bulldozer attachments for a crawler tractorin which a bulldozer blade is provided at each end of the tractor and inwhich said blades are very quickly and easily adjusted into differentoperative positions.

Another object is to provide hoisting and hauling means by which one ormore objects, such as logs that are to be moved, can be quickly andeasily made fast to the by either when the bulldozer attachments areconnected with the tractor or are disconnected therefrom.

Other objects of the invention will be apparent from the followingdescription and accompanying drawing.

In the drawing:

Fig. l is a plan view showing bulldozer means and hoisting and haulingmeans constructed in accordance with my invention as they may appearwhen installed on a crawler tractor, the tractor being somewhatdiagrammatically shown.

Fig. 2 is a view in side elevation of the same, parts being broken away.

Fig. 3 is a sectional view on of Fig. 2.

Fig. 4 is a sectional view, on a larger scale than Fig. 1, takensubstantially on broken line 4-4 of Fig. 1.

g '1 Claims.

tractor and moved therea larger scale than. 50'

Fig. 2, taken substantially on broken line '3-3 Fig. 5 is a sectionalview taken substantially on broken line 55 of Fig. 4.

Fig. 6 is a detached view in front elevation of a bulldozer blade whichmay be used in con- 5 nection with my invention.

Fig. 'l is a fragmentary end view with parts in section looking in thedirection of broken line 1-4 of Fig. 2 and showing a. portion of thehoisting and hauling means.

10 Fig.8 is a diagrammatic view on a smaller scale than the other viewsshowing angular positions into which the bulldozer blades may beadjusted.

Like reference numerals designate like parts throughout the severalviews.

In the drawing 9 designates a crawler tractor having the usual endlesstype treads ill and having rigid track frame members Ii positionedwithin the treads in.

In accordance with my invention two longitudinally extending guide barsi2 are positioned alongside of the treads in at each side of the tractorand are rigidly secured to the frame members ii. Each guide bar l2 has adownwardly extending top flange i3 and an upwardly extending bottomflange i l on its outer side.

The flanges i3 and it of each guide bar l2 cooperate with the guide barto form a suitable channel or trackway for slidably receiving abulldozer extension bar i5. One of the extension bars i5 is provided ateach side of the tractor. Preferably each lower flange i4 is removablysecured to its guide bar l2 as by bolts i6.

One side of each extension bar i5 is preferably beveled near the topedge thereof, as indicated by H, to facilitate insertion and removal ofthe extension bar i5 from the guide bar i2 and flange it when the lowerflange memberit is removed.

Each extension bar i5 has rack teeth ill on its top edge that mesh witha pinion or gear member i9. Each gear member i9 is secured to a shaft2ii'that is journaled in a gear housing 2|. Each gear housing 2| issecured to one of the guide bars" l2. The shafts 20 may be manuallyturned by applying a crank thereto to adjust the extension bars i5longitudinally.

Theextension bars i5 are rigidly held in any I fd'j'position byinserting pins or bolts 22 ,nnto uitabie holes 23 in the extension barsi5 fiiind. guide bars i2.

Four mounting'zdevices for bulldozer blades 24 are connected with thefour ends of the two extension bars J5. Each mounting device comprises amounting block 25 having a recess to receive an end portion of anextension bar I5 to which said block= 25 is secured by a removableasoaasa drawing, then reinforcing chambers 34 are preferably welded orotherwise rigidly secured to said blade at the location of the holes 32and 38.

The reinforcing members It on the back of the blades 24 extenddownwardly for a substantial distance toward the lower edge of the bladeand stop members 35 that end portions oi the bars 30. stop members 35extend outwardly through the slot 28.

3! for amount of lost motion the stud pins 3 l A screw threaded stem 40is rigidly secured to each bar 3|! and extends upwardly therefromthrough the hub of a threaded bevel gear II, A bearing member or cap 42rigid with each moun ing block 28 extends over the adjacent pinion 4|and the threaded stem Ill extends upwardly through this cap 42. Areversible electric motor II is carried on each mounting block 25 and abevel gear 44 on the shaft of each motor 43 meshes with one of the.bevel gears II for drivand lower the bulldozer blades 24 at will.

Hoisting devices provided in connection with this tractor comprise twoupright supports 45 rigidly secured to the rear end portions of the uidebars l2 and extending upwardly therefrom. A hoisting bar 46, preferablyof cylindrical shape is carried by'the supports 45 and exrorm it thistractor is logs.

When the machine is to be used as a bulldozer for moving material in thedirection in which 7o bl 4 the tractor is traveling then the arepositioned crosswise of in Fig. l, and the blade 24 bulldozer blades thetractor, as shown rigid support for the mounting blocks 01' the bladewith which material is being pushed and relieves the extension bars llof substantially all strain. LAISO thi positions the blade that is in isto be used as a grader to move material sidewise then the blades are setin an inclined position as shown in Fig. 8, and pins 22 are inserted toprevent longitudinal movement full line and dotted line positionsrespectively, in Fig. 8.

When the blades are in an angular position. as shown in Fig. 8, onemounting block II 01 The extension bars II can be disengaged from theguide bars ii-ll-H in two diil'erent ways. One way is by withdrawingpins 26 and disengaging the mounting the right, Fig. 2. and thenseparating the extension bars II from guide means by relativelongitudinal moveextension bars guide means i 2|3.

When this machine is in use If desired the bulldozer blades may be usedfor pushing around and moving objects such as logs that are to be moved.It is also possible to remove the bulldozer blades and use the mountingblocks 25 to push such objects around. For instance if a log has beensawed crosswise, it may be desirable to drive the tractor against thesawed portions of pieces of log apart so that they will be alongside ofthe tractor Where they may be readily hitched onto.

Objects, such as logs, may bemoved, either when thebulldozerattachment's are on the tractor and the rear blade 24 ispositioned as closely as possible to the'rear end of the tractonor whenin my invention may be and spirit of the following attachments for afixedly secured extending longituditread member; an extension throughsaid guide member and slidable therein; and a blade member connectedwith each end portion of said extension bar.

2. In bulldozer grading attachments for a two guide members fixedlysecrawler tractor, cured to the tractor frame and extendinglongitudinally thereof adjacent the respective outer sides of thetractor treads; extension bars slidably and removably supported in saidguide members and extending through said guide members and protruding inopposite directions from said nd two bulldozer blades at opof thetractor carried by said xtension bars, each extension bar beingconnected with a blade at each end of the tractor.

3. In bulldozer grading attachments for a crawler tractor, two guidemembers fixedly secured to the tractor frame and extendinglongitudinally thereof adjacent the respective outer sides of thetractor treads; extension bars slidably and removably supported in saidguide members and extending through said guide members and protruding inopposite directions from said guide members; means for locking saidextension bars in adjusted positions relative to said guide members; andtwo bulldozer blades at opposite ends of the tractor carried by saidextension bars,

the two at each end of the each extension bar being connected with ablade at each end of the tractor.

4. In bulldozer grading attachments for a crawler tractor, two guidemembers fixedly secured to the tractor frame and extendinglongitudinally thereof adjacent the respective outer sides of thetractor treads; extension bars slidably and removably supported in saidguide members and extending through said guide members and protruding inopposite directions from said guide members; means for locldng saidextension bars relative to said guide members; means for adiustablymoving said extension dinally; and two bulldozer blades at opposite endsof the tractor carried by said extension bars, each extension bar beingconnected with a blade at each end of the tractor. i

5. In bulldozer grading attachments for a crawler tractor, two guidemembers fixedly secured to the tractor frame and extendinglongitudinally thereof adjacent the respective outer sides of thetractor treads; extension bars slidably and removably supported in saidguide members and extending through said guide members and protruding inopposite directions from said said extenfor adiustably moving saidextension bars longitudinally; two bulldozer blades at opposite ends ofthe tractor carried by said extension bars, each extension bar beingconnected with a blade tractor; and means for raiscrawler tractor, twoguide members rigid with the tractor frame and extending longitudinallythereof along the outer sides of the tractor tread members; twoextension bars slidably supported in said guide members and extendingbeyond the bar, at least one mounting block on each extension bar beingremovable therefrom to permit the extension bars .to be removed from theextension members by relative longitudinal movement; and bulldozerblades carried by said extension bars.

'1. In bulldozer grading attachments for a crawler tractor, two guidemembers rigid with the tractor frame and extending longitudinallythereof along the outer sides of the tractor tread members; twoextension bars slidably supported in said guide members and extendingbeyond the ends of said guide members; a removable flange on each ofsaid guide members providing for convenient insertion and removal of theextension bar from the guide member; and two bulldozer blades atopposite ends of the tractor carried by said extension bars.

WILLIAM SNEED TAYLOR.

bars longitu-

